Mill Diameter Inch 1 Number of Flutes 2 Material Cobalt Length of Cut Inch 158 Shank Diameter Inch 1 FinishCoating Bright Single or Double End Double Center Cutting Yes Overall Length Inch 578 Flute Direction Right Cutting Direction Right Variable Helix No Helix Angle 30 Excellent tool geometry for slotting, keying and general purpose milling, plus the added economy offered by the doubleend design 2 helical flutes Centre cutting Double end with weldon shank